Download this app if: you want a faster way to message.
Instantly reach the people you care about.
Messenger is a fast, free and reliable way to stay in touch. It's just like texting, but you don't have to pay for every message (it works with your data plan).
Get to your messages without opening Facebook.
Chat with groups and make plans on...
Chatterbox — Although Facebook chat is an important communication tool for my daily life, I don't see much need for this app.